WO2002050400A3 - Method for determining magnetometer errors during wellbore surveying - Google Patents

Method for determining magnetometer errors during wellbore surveying Download PDF

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Publication number
WO2002050400A3
WO2002050400A3 PCT/US2001/049036 US0149036W WO0250400A3 WO 2002050400 A3 WO2002050400 A3 WO 2002050400A3 US 0149036 W US0149036 W US 0149036W WO 0250400 A3 WO0250400 A3 WO 0250400A3
Authority
WO
WIPO (PCT)
Prior art keywords
data
determining
coordinate system
corrected
survey
Prior art date
Application number
PCT/US2001/049036
Other languages
French (fr)
Other versions
WO2002050400A2 (en
Inventor
Robert Estes
Hatem Morsy
Andrew Brooks
Original Assignee
Baker Hughes Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Baker Hughes Inc filed Critical Baker Hughes Inc
Priority to AU2002227429A priority Critical patent/AU2002227429A1/en
Publication of WO2002050400A2 publication Critical patent/WO2002050400A2/en
Publication of WO2002050400A3 publication Critical patent/WO2002050400A3/en

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
    • G01C21/10—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 by using measurements of speed or acceleration
    • G01C21/12—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 by using measurements of speed or acceleration executed aboard the object being navigated; Dead reckoning
    • G01C21/16—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 by using measurements of speed or acceleration executed aboard the object being navigated; Dead reckoning by integrating acceleration or speed, i.e. inertial navigation
    • G01C21/18—Stabilised platforms, e.g. by gyroscope
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B47/00—Survey of boreholes or wells
    • E21B47/02—Determining slope or direction
    • E21B47/022—Determining slope or direction of the borehole, e.g. using geomagnetism
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
    • G01S19/38—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system
    • G01S19/39—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system the satellite radio beacon positioning system transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
    • G01S19/53—Determining attitude

Abstract

The present invention provides a method for determining magnetometer errors during wellbore survey operations. It is capable of determining errors on up to three axes, with or without the use of an external reference measurement of the local magnetic field, and is capable of providing an accurate result using data from a minimum number of surveys. A model is used to correct the observed data and the corrected data are transformed from the tool coordinate system to a different coordinate system referenced to the earth. The difference between the corrected transformed data and reference data in the earth coordinate system is minimized to determine the model parameters. The present invention also provides a method for determining residual uncertainty in the measurements and for quality control of the measurements. Once a survey has been obtained with reference to magnetic north, it is corrected using magnetic declination data obtained concurrently with the survey using surface GPS receivers, magnetometers and accelerometers.
PCT/US2001/049036 2000-12-18 2001-12-18 Method for determining magnetometer errors during wellbore surveying WO2002050400A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2002227429A AU2002227429A1 (en) 2000-12-18 2001-12-18 Method for determining magnetometer errors during wellbore surveying

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/740,082 2000-12-18
US09/740,082 US6508316B2 (en) 1998-05-14 2000-12-18 Apparatus to measure the earth's local gravity and magnetic field in conjunction with global positioning attitude determination

Publications (2)

Publication Number Publication Date
WO2002050400A2 WO2002050400A2 (en) 2002-06-27
WO2002050400A3 true WO2002050400A3 (en) 2003-03-06

Family

ID=24974962

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2001/049036 WO2002050400A2 (en) 2000-12-18 2001-12-18 Method for determining magnetometer errors during wellbore surveying

Country Status (3)

Country Link
US (1) US6508316B2 (en)
AU (1) AU2002227429A1 (en)
WO (1) WO2002050400A2 (en)

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Also Published As

Publication number Publication date
WO2002050400A2 (en) 2002-06-27
US6508316B2 (en) 2003-01-21
AU2002227429A1 (en) 2002-07-01
US20020005298A1 (en) 2002-01-17

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